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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script type="text/javascript">
        function sum1(a, b, c) {
            return a + b + c;
        }
        sum1(1, 2, 3)

        // 柯里化后
        function sum(a) {
            return (b) => {
                return (c) => {
                    return a + b + c
                }
            }
        }
        sum(1)(2)(3)
    </script>

</body>

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